RFR(S): 8208623: [TESTBUG] runtime/LoadClass/LongBCP.java fails in AUFS file system

[David Holmes]

Hi Pengfei,

On 1/08/2018 6:14 PM, Pengfei Li wrote:
> Hi,
> 
> Could you please help review the small fix to jtreg test case 
> “runtime/LoadClass/LongBCP.java” ?
> 
> This case fails in Linux AUFS file system since the maximum file name 
> length is shorter than 255.
> 
> JBS: https://bugs.openjdk.java.net/browse/JDK-8208623
> 
> webrev: http://cr.openjdk.java.net/~zyao/8208623/webrev.00/index.html 
> <http://cr.openjdk.java.net/%7Ezyao/8208623/webrev.00/index.html>

I'm wondering whether the filesystem type can be found through one of 
the java.nio.file APIs i.e FileSystem/FileStore/FileSystemProvider so 
that you do not have to exec the "stat -f -c %T ." command ??

It would also be beneficial for checking the operation of the test to 
print the "max length" value that it ends up testing.

Thanks,
David

> "Since aufs has several filename prefixes reserved, the maximum filename 
> length is shorter than ordinary 255. Actually 242 (defined as 
> ${AUFS_MAX_NAMELEN})." [1]
> 
> --
> 
> Thanks,
> 
> Pengfei
> 
> [1] http://aufs.sourceforge.net/aufs3/man.html
>